"use client";

import Link from "next/link";
import { CheckCircle2, ChevronUp, Loader2, X, XCircle } from "lucide-react";
import { useState } from "react";
import { createPortal } from "react-dom";
import { useJobs } from "@/components/layout/jobs-provider";
import { JobProgressPanel } from "@/components/job-progress-panel";
import { JOB_LABELS } from "@/lib/jobs/types";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";

export function ActiveJobsPanel({ floating = false }: { floating?: boolean }) {
  const { jobs, activeJobs, cancelJob, cancellingId } = useJobs();
  const [expanded, setExpanded] = useState(false);

  const progressType = (type: string) =>
    type === "analyze-topic" ? "analyze-topic" : type === "style-8d" ? "style-8d" : type === "ai-task" ? "ai-task" : "scan";

  const recentFinished = jobs
    .filter((job) => {
      if (job.status !== "completed" && job.status !== "failed") return false;
      const finishedAt = new Date(job.completedAt ?? job.createdAt).getTime();
      const age = Date.now() - finishedAt;
      const window = job.type === "ai-task" ? 30 * 1000 : 3 * 60 * 1000;
      return age < window;
    })
    .slice(0, 4);
  const visibleJobs = [...activeJobs, ...recentFinished.filter((job) => !activeJobs.some((active) => active.id === job.id))];

  if (!floating && visibleJobs.length === 0) return null;

  if (floating) {
    const current = activeJobs[0] ?? recentFinished[0];
    const running = activeJobs.length > 0;
    const panel = (
      <div className="fixed right-4 top-4 z-[60] flex flex-col items-end gap-2 lg:right-6 lg:top-6">
        <div className="flex items-center gap-2">
          {running && (
            <span className="hidden max-w-[180px] truncate rounded-full bg-card/95 px-3 py-1.5 text-xs font-medium text-foreground shadow-lg backdrop-blur-xl sm:block">
              {current.progress ?? current.label ?? JOB_LABELS[current.type as keyof typeof JOB_LABELS] ?? "任務進行中…"}
            </span>
          )}
          <button
            type="button"
            onClick={() => setExpanded((value) => !value)}
            className={`relative flex h-10 w-10 items-center justify-center rounded-full border shadow-lg backdrop-blur-xl transition hover:-translate-y-0.5 ${
              running
                ? "border-primary/40 bg-primary/10 text-primary"
                : current
                  ? current.status === "failed"
                    ? "border-danger-border bg-danger-bg text-destructive"
                    : "border-success-border bg-success-bg text-success"
                  : "border-border bg-card/95 text-muted-foreground"
            }`}
            aria-expanded={expanded}
            aria-label="任務中心"
          >
            <span className="text-sm font-bold">任</span>
            {running && (
              <span className="absolute inset-0 animate-ping rounded-full border border-primary/30" />
            )}
            {visibleJobs.length > 1 && (
              <span className="absolute -right-1 -top-1 flex h-4 min-w-4 items-center justify-center rounded-full bg-primary px-1 text-[9px] font-bold leading-none text-primary-foreground">
                {visibleJobs.length}
              </span>
            )}
          </button>
        </div>

        {expanded && (
          <Card className="max-h-[min(60vh,520px)] w-[min(360px,calc(100vw-2rem))] overflow-y-auto border-primary/25 bg-card/95 shadow-2xl backdrop-blur-xl">
            <CardHeader className="sticky top-0 z-10 flex-row items-center justify-between bg-card/95 pb-2 backdrop-blur-xl">
              <div>
                <CardTitle className="text-base">任務中心</CardTitle>
                <p className="mt-1 text-xs text-muted-foreground">
                  {visibleJobs.length === 0 ? "目前沒有任務" : "切換頁面不會中斷"}
                </p>
              </div>
              <Button size="sm" variant="ghost" className="h-8 w-8 p-0" onClick={() => setExpanded(false)} aria-label="收合任務進度">
                <ChevronUp className="h-4 w-4" />
              </Button>
            </CardHeader>
            <CardContent className="space-y-3">
              {visibleJobs.length === 0 ? (
                <p className="py-4 text-center text-sm text-muted-foreground">目前沒有進行中或最近完成的任務</p>
              ) : (
                visibleJobs.map((job) => (
                  <div key={job.id} className={`rounded-xl border p-3 text-[13px] ${job.status === "failed" ? "border-danger-border bg-danger-bg" : "border-border bg-muted/50"}`}>
                    <div className="flex items-start justify-between gap-2">
                      <div className="flex min-w-0 items-center gap-2">
                        {job.status === "running" || job.status === "pending" ? <Loader2 className="h-4 w-4 shrink-0 animate-spin text-primary" /> : job.status === "failed" ? <XCircle className="h-4 w-4 shrink-0 text-destructive" /> : <CheckCircle2 className="h-4 w-4 shrink-0 text-success" />}
                        <p className="truncate font-medium">{job.label ?? JOB_LABELS[job.type as keyof typeof JOB_LABELS]}</p>
                      </div>
                      {(job.status === "running" || job.status === "pending") && <Button size="sm" variant="ghost" className="h-7 shrink-0 px-2 text-[11px]" onClick={() => cancelJob(job.id)} disabled={cancellingId === job.id}>
                        {cancellingId === job.id ? <Loader2 className="h-3 w-3 animate-spin" /> : <X className="h-3 w-3" />}停止
                      </Button>}
                    </div>
                    <div className="mt-2"><JobProgressPanel summary={job.progress} progressDetailRaw={job.progressDetail} compact jobType={progressType(job.type)} /></div>
                    {job.error && <p className="mt-2 text-xs text-destructive">錯誤：{job.error}</p>}
                    {job.type === "style-8d" ? <Link href="/accounts" className="mt-2 inline-block text-[11px] text-muted-foreground underline">查看帳號策略</Link> : job.topicId && <Link href={`/scans/${job.topicId}`} className="mt-2 inline-block text-[11px] text-muted-foreground underline">查看任務</Link>}
                  </div>
                ))
              )}
            </CardContent>
          </Card>
        )}
      </div>
    );

    if (typeof document === "undefined") return panel;
    return createPortal(panel, document.body);
  }

  return (
    <Card className="mb-5 overflow-hidden border-primary/25 bg-primary/[0.035] shadow-[0_12px_35px_rgba(71,53,31,.06)]">
      <CardHeader className="pb-2">
        <CardTitle className="flex items-center gap-2 text-base"><Loader2 className="h-4 w-4 animate-spin text-primary" />任務中心</CardTitle>
        <p className="text-[13px] text-muted-foreground">
          可以自由切換頁面；分析與海巡會在背景繼續執行
        </p>
      </CardHeader>
      <CardContent className="space-y-3">
        {visibleJobs.map((job) => (
          <div
            key={job.id}
            className="rounded-lg border border-border bg-muted/40 px-3.5 py-3 text-[13px]"
          >
            <div className="flex items-start justify-between gap-2">
              <div className="flex items-center gap-2">
                {job.status === "running" || job.status === "pending" ? <Loader2 className="h-4 w-4 animate-spin text-muted-foreground" /> : job.status === "failed" ? <XCircle className="h-4 w-4 text-destructive" /> : <CheckCircle2 className="h-4 w-4 text-success" />}
                <p className="font-medium">
                  {job.label ?? JOB_LABELS[job.type as keyof typeof JOB_LABELS]}
                </p>
              </div>
              {(job.status === "running" || job.status === "pending") && <Button
                size="sm"
                variant="outline"
                className="h-7 shrink-0 px-2 text-[11px]"
                onClick={() => cancelJob(job.id)}
                disabled={cancellingId === job.id}
              >
                {cancellingId === job.id ? (
                  <Loader2 className="h-3 w-3 animate-spin" />
                ) : (
                  <X className="h-3 w-3" />
                )}
                停止
              </Button>}
            </div>
            {job.error && <p className="mt-2 text-xs text-destructive">錯誤：{job.error}</p>}
            <div className="mt-2">
              <JobProgressPanel
                summary={job.progress}
                progressDetailRaw={job.progressDetail}
                compact
                jobType={progressType(job.type)}
              />
            </div>
            {job.type === "style-8d" ? (
              <Link href="/accounts" className="mt-2 inline-block text-[11px] underline text-muted-foreground">
                查看帳號策略
              </Link>
            ) : job.topicId && (
              <Link
                href={`/scans/${job.topicId}`}
                className="mt-2 inline-block text-[11px] underline text-muted-foreground"
              >
                查看主題
              </Link>
            )}
          </div>
        ))}
      </CardContent>
    </Card>
  );
}